steve sl550

HI CR

Tx for your response...comforting to know all Sis are covered.

One more question: Why do you think no reported issues yet regarding Sis....any difference in construction or materials of the sub frames on the SLs or just lighter use???

rmorin49

Likely that many if not most SLs are:

1. Only driven in good weather
2. Located in areas with mild winters and thus avoid exposure to corrosive chemicals
3. Small numbers mean less documented cases

steve sl550

Was hoping MB used better materials in our SLs not reasons as speculated above; maybe CR knows for sure and will advise??

Montreal300

Seems like a few in the UK.
https://forums.mercedesclub.org.uk/i...2#post-2012113.
Mercedes has probably grouped cars into the recall that have a subframe with the same metallurgy and design and /or the same sub-supplier. I understand that the root cause are openings in the frame that allow moisture entry but the inside of the frame was never coated nor were adequate drain holes designed in. A look at the R172 headaches on 10+ year old cars will give you a heads up on what's to come.

crconsulting

I can tell you the same part is used in the SL's from 2013 on....
SL63's use a different part. As my profile says, I'm in Nor Cal so we wouldn't see something like that out here.
I can also tell you corrosion such as this is typically caused by lack of oxygenation. i.e. dirt buildup, and then subsequent corrosion breaking down the painted/coated surfaces underneath. Brake lines are also subject to the same type of corrosion, and to be honest, see that as more of an issue for many cars, not just MB. Best way to prevent this is just making sure your undercarriage is clean. Nice pressure wash after winter is probably a good investment, if you live in those kinds of places with a lot of exposure to anti-icing products and dirt on the road.

See @rmorin49 post #27, as far as to probable reasons why no cases have been reported in the US.

As far as facelift cars being covered, looks like it covers pre-facelift cars only (see below). But would be surprised if they would deny a claim on a facelift car.
And as I mentioned above, same part number is used throughout ALL production years.